Sulistyawati, E., M. Saiful Zahro, and E. Septianawati. “HOTS Problem-Based Learning Design to Enhance Mathematical Reasoning Abilities”. Jurnal Pengembangan Pembelajaran Matematika, vol. 6, no. 1, Mar. 2024, pp. 1-13, doi:10.14421/jppm.2024.61.1-13.